 |
|
|
|
|
|
|
|
|
Definitions and descriptions |
2003-06-08 |
|
From Tammy:
MY DAUGHTERS TEACHER ASKED HER TO GIVE BOTH A DESCRIPTION AND A DEFINITION OF THE FOLLOWING ... CIRCLE, SQUARE, TRIANGLE,HEXAGON...... THE LIST GOES ON. WHAT IS THE DIFFERENCE BETWEEN DEFINITION AND DESCRIPTION ? DO A CIRCLE FOR AN EXAMPLE PLEASE.
Answered by Penny Nom. |
|
|
|
|
|
|
The metric and Imperial systems |
2003-06-08 |
|
From Ashlee:
i am a year 8 student, and i am doing my Maths talent quest on the Metric and Imperial number system.
i was wondering, where did the 2 systems orginate and if possible, a little bit or information.
I also need to know the conversions of ounce, foot, mile..etc..from imperial to metric.
Answered by Penny Nom. |
|
|
|
|
|
|
A radio controled car |
2003-06-08 |
|
From Robert:
I have a radio controled car (scale size 1/43). This car can travel 490 ft. per minute. I would like to know how fast that is at that scale size in miles per hour (and Kilometers per hour)?
Answered by Penny Nom. |
|
|
|
|
|
|
Spacing the spindles for a railing |
2003-06-06 |
|
From Jennifer:
Scott is a homebuilder. He builds railings in which he places spindles. Spindles ar evertical posts taht are equally spaced beneath a horizontal bar. Scott would like a mathematical model to help him determine the amount of space to put between each spindle. The railing must follow the following criteria: The spaces between each spindle must be equal except for the ones at either end. Theses spaces are smaller. They are half the width of a spindle less than the other spaces. The number of spindles needs to be minimized since spindles are costly. Help Scott determine what width of space to use between the spindles. Create a mathematical model to determine the width of space between each spindle in termso f the number of spindles. Use an 8' (96") railing that has 2 1/2" wide spindles. Explain your thinking. For safety reasons the maximum width of a space is 4" Generalize you model to determine the width of spaces for total railing of length L and spindle width s
Answered by Penny Nom. |
|
|
|
|
|
|
The square footage of a section of land |
2003-06-04 |
|
From Diane:
We are trying to calculate the square footage of a section of land with the following dimensions:
One end is 100 feet. The other end is 105 feet.. One side is 350 feet and the other side is 372 feet. I calculated the area as 35,875 sq. feet, however, the brochure for the land says the area is 36,200 + sq. feet.
Answered by Leeanne Boehm. |
|
|
|
|
|
|
$22,534.56 is what percent of $27,820.00? |
2003-06-04 |
|
From Minnie:
$22,534.56 is what percent of $27,820.00?
Answered by Penny Nom. |
|
|
|
|
|
|
BEDMAS |
2003-05-31 |
|
From Kristie:
(3x50)+20/5=?
I know bedmas but i forget how to do it.
Answered by Penny Nom. |
|
|
|
|
|
|
$1/week for week 1 and then double each week |
2003-05-28 |
|
From A student:
I AM DOING A PROJECT FOR MATH I AM TRYING TO CREATE A SEQUENCE BASED ON: MAKING A SALARY OF $1/WK FOR THE FIRST WEEK WITH IT DOUBLING EVERY WEEK FOR 52 WEEKS, SO MY SEQUENCE LOOKS LIKE THIS: 1,2,4,8,16,32,64,128,256,512,1024 ETC. THERE WOULD BE 52#'s TOTAL IN MY SEQUENCE.I BELIEVE IT IS CALLED A FINITE SEQUENCE. MY QUESTION IS HOW DO I CREATE A FORMULA/RULE FOR THIS PARTICULAR SEQUENCE? MY GOAL BEING TO FIND THE 52nd TERM IN THE SEQUENCE.
Answered by Penny Nom. |
|
|
|
|
|
|
5 to the power n |
2003-05-28 |
|
From Sam:
What is the integer n for which
5 to the n power + 5 to the n power + 5 to the n power + 5 to the n power + 5 to the n power = 5 to the 25th power?
Answered by Penny Nom. |
|
|
|
|
|
|
Millimeters to inches |
2003-05-28 |
|
From Brian:
I am a music instructor just trying to get a horn repaired. I have been trying to get replacement pearls for a keyboard of a horn. The mechanic needs the measurement in inches. The calibers say that the size is .115 mm can you tell me what that is in inches, I tried your formula of 2.54 mm per inch but this is a smaller size and I cannot seem to figure it out.
Answered by Penny Nom. |
|
|
|
|
|
|
George and his goat herd |
2003-05-27 |
|
From A student:
George the bulgarian goatherd drives his father's goats into a valley each morning and lets them browse there all day before driving them home in the evening. he notices that each morning the goats immediately separate into groups and begin to feed the number and sizes of the initial groups vary some days there are nine and so days there are three or fewer. there can be groups of one or the whole group. about every five minites one goat breaks away from each feeding group and these breakaway goats form into a new group. George has noticed that by the afternoon, even though the goats continue their regrouping the sizes of the groups have stabilised, and there is always seven feeding groups. How many goats are there in the herd? What are the sizes of the feeding groups once they have stabilised?
Answered by Penny Nom. |
|
|
|
|
|
|
Two sequences that agree in the first 4 terms |
2003-05-26 |
|
From A student:
Is it possible to have two formulas that define sequences that agree on the first four terms but not the rest?
Answered by Penny Nom. |
|
|
|
|
|
|
The cross-section of a football field |
2003-05-25 |
|
From Francis:
Have you ever walked on a football field covered with artificial turf? If so, you probably noticed that the field is not flat. The profile of the surface is arched and highest in the centre, permitting rainwater to drain away quickly. height from base to highest point- 45.75 centimetres distance of the field- 50 metres a) The diagram shows the profile of an actual field, viewed from the end of the field. Assuming that the cross-section is a parabola, find the algebraic model that describes this shape. b) Use your equation to determine the distance from the sidelines where the field surface is 20 cm above the base line.
Answered by Harley Weston. |
|
|
|
|
|
|
Two piles of cards |
2003-05-24 |
|
From Sam:
A standard deck of 52 cards (26 red, 26 black) is separated into two piles, not necessarily equal in size. The first pile contains seven times as many black cards as red cards. The second pile contains a number of red cards that is a multiple of the number of black cards in that pile. How many red cards are in the first pile?
Answered by Penny Nom. |
|
|
|
|
|
|
An array of pennies |
2003-05-23 |
|
From Saundra:
If you have 100 pennies and you are suppose to make an array do you arrange the pennies by date?
Answered by Penny Nom. |
|
|
